Re: [Xen-users] Cluster xen

[Bart Coninckx <bart.coninckx@xxxxxxxxxx>]

On 03/05/12 23:41, netz-haut - stephan seitz wrote:

Am Montag, den 05.03.2012, 20:52 +0100 schrieb Bart Coninckx:

>> To help this fellow along, I will translate his post:
>>
>> Hello,
>>
>> I would like to implement a cluster with Xen or Xen server with two Dell
>> R710 servers.
>>
>> I would like to build a cluster using the entire added diskspace of the two
>> servers, as well as the total memory.
>>
>> What are your experiences and configurations for this?
>>
>> Thanks in advance,
>>
>> Regards,
>>
>> Mat
>>
>>
>>
>> Well Mat,
>>
>> I usually use DRBD and Pacemaker for this. You can load balance the cluster
>> resources (being Xen DomU's) across the two nodes. For live migration you
>> need dual primary.
>> For dual primary you need stonith.
>>
>> Read up on http://www.clusterlabs.org
>>
>> B.
>>
>>
>>
>>
> http://www.cloudstack.org/
>
>
>>
>>
>> _______________________________________________
>> Xen-users mailing list
>> Xen-users@xxxxxxxxxxxxx
>> http://lists.xen.org/xen-users
I'm not familiar (yet) with Cloudstack, but 
http://cloudstack.org/cloudstack/requirements.html seems to state that 
the requirements are more than two servers. I guess this solution won't 
do Mat a lot of good, does it?

cheers,


B.

You're right. To get useful benefits from using cloudstack, one would need *at least* one gateway/firewall,
one management node, a primary storage (local, redundant like drbd master/master are not supported
out of the box and need to be "hacked"), one secondary storage (nfs e.g.) and at least one switch capable
of dynamic vlan registration (i forget, 802.something).
Personally, I love cloudstack, but for the OP's needs, drbd master/master with a stonith (could be done via
IPMI / iDRAC) would be a much better solution. For a two node cluster, i think, REMUS and/or Kemari projects
are worth a try for failover scenarios.

I'm actually having the same challenge as OP. What if you would run cloudstack ON a drbd master/master as a series of virtual machines? The main benefit would be easy provisioning, central management, snapshotting etc


B.

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